Wide-input DC-DC converters

27 April 2011 Power Electronics / Power Management

SynQor’s new IQ64 family of industry-standard half brick DC-DC converters has a wide 8:1 input voltage range of 18-135 V, allowing designers to simultaneously satisfy EN50155 requirements for 36 V, 48 V and 72 V railway systems with one converter. The devices use SynQor’s patented two-stage topology with a constant mid-bus voltage, which enables an isolation stage design based on synchronous rectifiers, reducing heat loss and achieving up to 90% efficiency at full load.

The IQ64 series further expands the InQor family of fully encased and ruggedised, isolated DC-DC converters for industrial and transportation applications. The half-brick format is comprised of nine output voltages – 1,8 V, 3,3 V, 5 V, 12 V, 15 V, 24 V, 28 V, 40 V and 48 V. For each output voltage there are two converters: one with a power rating in the 200 W range and a second lower-cost unit in the 150 W range for lower power requirements.

The broad range of output voltages and power levels makes the converter series suitable for a variety of 24 V, 36 V, 48 V and 72 V systems, such as industrial automation, and locomotive and railway electronics. The use of fixed switching frequency technology provides predictable EMI performance which greatly simplifies filtering design. The converters provide on/off control referenced to the input side, remote sense for the output voltage and an output voltage trim range of -20%, +10%. Protection features include input under-voltage lockout, input over-voltage shutdown, output current limit and short circuit protection, active back bias limit, output over-voltage protection and thermal shutdown. All models have at least 4250 V d.c. isolation rating between input and output, have calculated MTBF values in excess of 2 million hours and are fully RoHS compliant.

For more information contact Conical Technologies, +27 (0)12 347 5035, [email protected], www.conical.co.za

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